9. Los Angeles/Long Beach

Mark Boster/Los Angeles Times/MCT

The Queen Mary in Long Beach Harbor is undergoing renovations to attract more tourists. The historic luxury cruise ship is docked in Long Beach, California, where it has served as a hotel, special events center and tourist attraction.

The Queen Mary in Long Beach Harbor is undergoing renovations to attract more tourists. The historic luxury cruise ship is docked in Long Beach, California, where it has served as a hotel, special events center and tourist attraction. (Mark Boster/Los Angeles Times/MCT)

The Queen Mary in Long Beach Harbor is undergoing renovations to attract more tourists. The historic luxury cruise ship is docked in Long Beach, California, where it has served as a hotel, special events center and tourist attraction.